diff --git a/src/themes/basic/_layout.css b/src/themes/basic/_layout.css
index bdfe476a1..8b77f59f9 100644
--- a/src/themes/basic/_layout.css
+++ b/src/themes/basic/_layout.css
@@ -8,6 +8,8 @@
 }
 
 body:not(.ready) {
+  overflow: hidden;
+
   [data-cloak] {
     display: none;
   }